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Titolo:
Induction of progesterone receptor immunoexpression in stromal tissue throughout the male reproductive tract after neonatal oestrogen treatment of rats
Autore:
Williams, K; Saunders, PRK; Atanassova, N; Fisher, JS; Turner, KJ; Millar, MR; McKinnell, C; Sharpe, RM;
Indirizzi:
MRC, Human Reprod Sci Unit, Ctr Reprod Biol, Edinburgh EH3 9ET, Midlothian, Scotland MRC Edinburgh Midlothian Scotland EH3 9ET h EH3 9ET, Midlothian, Scotland
Titolo Testata:
MOLECULAR AND CELLULAR ENDOCRINOLOGY
fascicolo: 1-2, volume: 164, anno: 2000,
pagine: 117 - 131
SICI:
0303-7207(20000620)164:1-2<117:IOPRII>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
ESTROGEN-RECEPTOR; PRENATAL EXPOSURE; POSTNATAL-DEVELOPMENT; REGIONAL DIFFERENCES; SEMINAL-VESICLES; EXCURRENT DUCTS; MARMOSET MONKEY; MESSENGER-RNA; SCHWANN-CELLS; ADULT-RAT;
Keywords:
diethylstilboestrol; estrogen receptor-alpha; estrogen receptor-beta; progesterone receptor; dorsolateral prostatic complex; epididymis; seminal vesicles; vas deferens; stromal cells; epithelial cells;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
54
Recensione:
Indirizzi per estratti:
Indirizzo: Williams, K MRC, Human Reprod Sci Unit, Ctr Reprod Biol, 37 Chalmers St, Edinburgh EH39ET, Midlothian, Scotland MRC 37 Chalmers St Edinburgh Midlothian Scotland EH3 9ET tland
Citazione:
K. Williams et al., "Induction of progesterone receptor immunoexpression in stromal tissue throughout the male reproductive tract after neonatal oestrogen treatment of rats", MOL C ENDOC, 164(1-2), 2000, pp. 117-131

Abstract

Oestrogen exposure of the male during fetal/neonatal life can fundamentally alter the structure and function of the reproductive system, though how is unknown. This study examined whether such treatment was able to induce a 'female' characteristic, namely immunoexpression of progesterone receptor (PR), in the reproductive system of the male. Rats were treated on postnataldays 2, 4, 6, 8, 10 and 12 with either 10, 1 or 0.1 mu g diethystilbestrol(DES) or with the vehicle (20 mu l corn oil). Groups of control and treated rats were killed on days 18, 25, 35 and 90 (= adults) and tissues fixed in Bouins for immunolocalisation studies using antisera to PR (recognises A and B forms) and oestrogen receptor-beta (ERP). PR immunoexpression was absent from all tissues studied in control rats at all ages with the exceptionof the parasympathetic ganglia of the prostate. In rats treated with 10 mug DES, intense immunoexpression of PR was detected in the nuclei of stromal, but not epithelial, cells of the caput and cauda epididymis, the vas deferens, seminal vesicles and at the base of the dorsolateral prostatic complex (DLPC) at day 18, but was absent from the ventral prostate and from the testis. DES induction of PR immunoexpression was evident after a single injection (on day 3) and at 18-35 days the intensity of immunoexpression was DES dose-dependent; rats treated neonatally with 0.1 mu g DES showed no detectable PR immunoexpression at any age. These findings were confirmed by Western analysis which indicated that most of the PR induced was probably the B form. Co-localisation studies, using confocal microscopy, demonstrated that PR and ERP frequently co-localised to the same stromal cells in the DLPC, epididymis and seminal vesicles of DES-treated rats at day 18, whereas epithelial cells, which also expressed ERP, did not express PR. In the tissues studied, only occasional stromal cells expressed ER alpha in comparison to the more widespread expression of ER beta, although epithelial cell expression of ER alpha was also detected in the epididymis on day 18 (but not onday 10). In DES-treated rats, immunoexpression of PR in the reproductive tract decreased progressively in intensity from days 18-35 and was non-detectable in adulthood. In conclusion, these findings are interpreted as evidence that neonatal oestrogen treatment exerts pervasive 'reprogramming' effects throughout the reproductive system of the developing male as indicated by the induction of PR immunoexpression. This induction was restricted to stromal tissue even though both stromal and epithelial cells at most sites expressed ER beta and/or ER alpha. (C) 2000 Elsevier Science Ireland Ltd. Allrights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/03/20 alle ore 20:00:15